Even high-profile fliers sometimes have to deal with delays. Today, Democrat presidential candidate Barack Obama's plane developed a mechanical problem that lead to an unscheduled landing in St. Louis. Obama was flying to Charlotte, N.C., but ended up on the ground waiting for a repair to the Air Midwest MD-80 carrying him and his entourage. After an hour, he took off on another flight. Charter. Not commercial. Lucky guy. Most of us would still be grounded.